Five minutes
If a woman is getting dressed, this means a half an hour. For a man, it again depends on the context. If the man is playing video games, "five minutes" is about half an hour. Getting ready for an intimate encounter? "Five minutes is two minutes." Preparing to leave the house? "Five minutes" means five minutes and if the woman is not in the car in exactly five minutes she will find herself under a veritable barrage of honking.

Generalizations
It's so easy to make a thoughtless and incorrect statement such as "You always" or "You never." Logically speaking, we know that such a statement is seldom if ever correct. So when you use words like "always" and "never," the other person usually gets quite defensive ... because they know you're wrong. You're inviting the other person to challenge you. And you have enough trouble in your life without encouraging a fight.